CN208224884U - Temperature self-adaptation current source and optical module - Google Patents
Temperature self-adaptation current source and optical module Download PDFInfo
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Abstract
The utility model discloses a kind of temperature self-adaptation current source and optical module, the temperature self-adaptation current source includes proportion current source, thermistor, power end, input terminal and output end；The proportion current source includes reference current branch and output current branch, and the thermistor is connected in the reference current branch or is connected in the output current branch；One end of the reference current branch connects the input terminal and is suitable for receiving the feedback current from optical assembly, one end of the output current branch connects the output end and is suitable for exporting sample rate current to the driving chip of the optical assembly, the sample rate current and temperature are positively correlated, and the other end of the reference current branch connects the power end with the other end of the output current branch.Temperature self-adaptation current source and optical module provided by the utility model can be avoided and the problem of high temperature leads to the increase of optical module power consumption, the lost of life and communication disruption occur.
Description
Technical field
The utility model relates to technical field of photo communication, and in particular to a kind of temperature self-adaptation current source and optical module.
Background technique
It is currently being widely used optical module, the bias current of driving chip output is to laser diode (LD, Laser
Diode the close-loop driven mode of Automatic optical power control (APC, Automatic Power Control)) is all used substantially, i.e.,
Configuration driven chip at normal temperature makes laser diode transmitting optical power in some definite value.General optical assembly, such as bi-directional light
Component (BOSA, Bi-directional Optical Sub-Assembly), is not provided only with laser diode, is also provided with
Backlight diode (MPD, Monitor Photodiode).The transmitting optical power that backlight diode is used to monitor laser diode is big
It is small, transmitting optical signal is converted to current signal and is supplied to driving chip, to inform the reality of driving chip laser diode at this time
Border emits optical power size.Driving chip responds according to this, adjusts the bias current size of its output, realizes auto light power
Control function, so that the actual transmission optical power of laser diode be made to keep dynamic stability with temperature change.
As the temperature rises, optical module is in order to keep needing to increase with transmitting optical power identical under room temperature, driving chip
Big bias current, while increasing modulation electric current so that transmitting optical signal keeps extinction ratio appropriate.However, due to bias current and
It modulates electric current to increase, optical module is faced with following three problem: optical module overall power increases, and own temperature becomes higher；By
Become higher in own temperature, may fall into temperature increase, bias current and modulation electric current increase, power consumption increase, temperature it is higher
Endless loop, laser diode work until breaking through the work upper limit of laser diode, leads to communication quality in nonlinear area
Phenomena such as decline is even interrupted；Laser diode reduced performance, the lost of life.
Utility model content
To be solved in the utility model is that high temperature causes optical module power consumption to increase, the lost of life and communication quality decline
The problem of even interrupting.
The utility model is achieved through the following technical solutions:
A kind of temperature self-adaptation current source, including proportion current source, thermistor, power end, input terminal and output end；
The proportion current source includes reference current branch and output current branch, and the thermistor is connected on the base
In quasi- current branch or it is connected in the output current branch；
One end of the reference current branch connects the input terminal and is suitable for receiving the feedback current from optical assembly, institute
The one end for stating output current branch connects the output end and is suitable for exporting sample rate current, institute to the driving chip of the optical assembly
It states sample rate current and temperature is positively correlated, the other end of the reference current branch is connected with the other end of the output current branch
The power end.
Optionally, the power end is suitable for receiving supply voltage, and the output current branch includes first resistor and first
PNP triode, the reference current branch include second resistance and the second PNP triode；
The other end of the one end of the first resistor as the output current branch, the other end of the first resistor connect
The emitter of first PNP triode is connect, the base stage of first PNP triode connects the base of second PNP triode
The collector of pole and second PNP triode, the collector of first PNP triode is as the output current branch
One end；
The other end of the other end of the one end of the second resistance as the reference current branch, the second resistance connects
Connect the emitter of second PNP triode, the collector of second PNP triode as the reference current branch one
End.
Optionally, the thermistor is the thermistor of negative temperature coefficient and the thermistor is connected on the output
In current branch；Alternatively, the thermistor is the thermistor of positive temperature coefficient and the thermistor is connected on the base
In quasi- current branch.
Optionally, the thermistor is the thermistor of negative temperature coefficient；
The thermistor is connected between the power end and one end of the first resistor or the thermistor
It is connected between the other end of the first resistor and the emitter of first PNP triode.
Optionally, the thermistor is the thermistor of positive temperature coefficient；
The thermistor is connected between the power end and one end of the second resistance or the thermistor
It is connected between the other end of the second resistance and the emitter of second PNP triode.
Optionally, the power end ground connection, the output current branch includes first resistor and the first NPN triode, institute
Stating reference current branch includes second resistance and the second NPN triode；
The other end of the one end of the first resistor as the output current branch, the other end of the first resistor connect
The emitter of first NPN triode is connect, the base stage of first NPN triode connects the base of second NPN triode
The collector of pole and second NPN triode, the collector of first NPN triode is as the output current branch
One end；
The other end of the other end of the one end of the second resistance as the reference current branch, the second resistance connects
Connect the emitter of second NPN triode, the collector of second NPN triode as the reference current branch one
End.
Optionally, the thermistor is the thermistor of negative temperature coefficient and the thermistor is connected on the output
In current branch；Alternatively, the thermistor is the thermistor of positive temperature coefficient and the thermistor is connected on the base
In quasi- current branch.
Optionally, the thermistor is the thermistor of negative temperature coefficient；
The thermistor is connected between the power end and one end of the first resistor or the thermistor
It is connected between the other end of the first resistor and the emitter of first NPN triode.
Optionally, the thermistor is the thermistor of positive temperature coefficient；
The thermistor is connected between the power end and one end of the second resistance or the thermistor
It is connected between the other end of the second resistance and the emitter of second NPN triode.
The utility model also provides a kind of optical module, including optical assembly, driving chip and above-mentioned temperature self-adaptation electric current
Source；
The optical assembly is used under the driving of bias current and modulation electric current generate transmitting light, and detects the transmitting light
Watt level exports the feedback current；
The temperature self-adaptation current source is for receiving the feedback current, and to the feedback current scaling transformation,
Export the sample rate current；
The driving chip, according to the sample rate current size, exports the biasing for receiving the sample rate current
Electric current and the modulation electric current.
The utility model compared with prior art, has the following advantages and benefits:
It is different to driving chip from existing optical assembly static output feedback electric current, temperature self-adaptation provided by the utility model
The temperature self-adaptation current source, proportion of utilization electric current is arranged in current source and optical module between optical assembly and driving chip
Source carries out mirror image to the feedback current that optical assembly exports, to export sample rate current to the driving chip of the optical assembly.By
Series thermal-sensitive resistance in the reference current branch of the proportion current source or output current branch, realize the sample rate current and
Temperature is positively correlated, and so that the driving chip is adjusted the transmitting optical power size of optical assembly according to the sample rate current, and then reduce
Transmitting optical power under high temperature avoids the occurrence of the problem of high temperature leads to the increase of optical module power consumption, the lost of life and communication disruption,
The transmitting optical power under low temperature is improved, is avoided since electric current is too low causes under chip processing performance for the bias current of needs and modulation
Drop, to avoid generating data communication error code or other exceptions.
Further, compared with increasing cooling fin, semiconductor cooler or external fan in optical module, the utility model
The temperature self-adaptation current source and optical module of offer directly reduce transmitting optical power, to reduce optical mode under high temperature environment
The power consumption of block then reduces the temperature of optical module itself, can optimize high-temperature behavior；Temperature self-adaptation provided by the utility model
Current source and optical module are carried out automatically controlling using hardware circuit sense ambient temperature, without APC temperature lookup table,
Because greatling save manpower and time cost without increasing cumbersome temperature acquisition and data handling procedure；It is lowered with room temperature
Low transmitting optical power is compared with improving high-temperature behavior, and temperature self-adaptation current source and optical module provided by the utility model are mentioning
While rising high-temperature behavior, optical power is emitted in low temperature environment with respect to height under room temperature, i.e. bias current and modulation electric current drives
Dynamic laser diode work improves the reliability of laser diode work, avoids too low bias current can not in linear region
Laser diode is opened, avoids causing chip processing performance to decline since the bias current and modulation electric current of needs are too low, thus
It avoids generating data communication error code or other exceptions；It is sent out with poll optical mode deblocking temperature and bias current, using MCU and software control
It penetrates optical power to compare, temperature self-adaptation current source and optical module provided by the utility model are made of, cloth a small number of discrete components
Plate suqare is small, at low cost, and hardware automatically controls, and saves software translating and debugging process.
Detailed description of the invention
Attached drawing described herein is used to provide to further understand the utility model embodiment, constitutes the one of the application
Part does not constitute the restriction to the utility model embodiment.In the accompanying drawings:
Fig. 1 is a kind of circuit diagram of the temperature self-adaptation current source of embodiment of the utility model；
Fig. 2 is the circuit diagram of the temperature self-adaptation current source of the utility model another kind embodiment；
Fig. 3 is the circuit diagram of the temperature self-adaptation current source of the utility model another kind embodiment；
Fig. 4 is the circuit diagram of the temperature self-adaptation current source of the utility model another embodiment；
Fig. 5 is the circuit diagram of the temperature self-adaptation current source of the utility model another embodiment；
Fig. 6 is the circuit diagram of the temperature self-adaptation current source of the utility model another embodiment；
Fig. 7 is the circuit diagram of the temperature self-adaptation current source of the utility model another embodiment；
Fig. 8 is the circuit diagram of the temperature self-adaptation current source of the utility model another embodiment；
Fig. 9 is the electrical block diagram of the optical module of the utility model embodiment.
Specific embodiment
The utility model provides a kind of temperature self-adaptation current source, the feedback electricity exported using proportion current source to optical assembly
Stream carries out mirror image, to export sample rate current to the driving chip of the optical assembly, and passes through the benchmark in the proportion current source
Series thermal-sensitive resistance in current branch or output current branch realizes that the sample rate current and temperature are positively correlated, to reduce
Transmitting optical power under high temperature improves the transmitting optical power under low temperature.Specifically, the temperature self-adaptation current source includes ratio
Current source, thermistor, power end, input terminal and output end.The proportion current source includes reference current branch and output
Current branch, the thermistor are connected in the reference current branch or are connected in the output current branch；Institute
The one end for stating reference current branch connects the input terminal and is suitable for receiving the feedback current from optical assembly, the output electric current
One end of branch connects the output end and is suitable for exporting sample rate current, the sample rate current to the driving chip of the optical assembly
It is positively correlated with temperature, the other end of the reference current branch connects the power supply with the other end of the output current branch
End.
For the purpose of this utility model, technical solution and advantage is more clearly understood, below with reference to embodiment and attached drawing,
The utility model is described in further detail, and the exemplary embodiment and its explanation of the utility model are only used for explaining this
Utility model is not intended to limit the scope of the present invention.
Embodiment 1
The present embodiment provides a kind of temperature self-adaptation current source, Fig. 1 is the circuit diagram of the temperature self-adaptation current source, institute
Stating temperature self-adaptation current source includes proportion current source, thermistor RNTC, power end, input terminal IPD and output end IMPD.
Specifically, the proportion current source includes reference current branch and output current branch, the thermistor RNTCString
It is associated in the reference current branch or is connected in the output current branch；One end of the reference current branch connects
The input terminal IPD simultaneously is suitable for receiving the feedback current I from optical assemblyPD, it is described output current branch one end connection described in
Output end IMPD simultaneously is suitable for exporting sample rate current I to the driving chip of the optical assemblyMPD, the sample rate current IMPDJust with temperature
Correlation, i.e. temperature sample rate current I when increasingMPDIncrease, temperature sample rate current I when reducingMPDReduce, the benchmark electricity
The other end for flowing branch connects the power end with the other end of the output current branch.
In the present embodiment, the power end is suitable for receiving supply voltage VCC, and the output current branch includes the first electricity
It hinders R1 and the first PNP triode Q1, the reference current branch includes second resistance R2 and the second PNP triode Q2.Described
The other end of the one end of one resistance R1 as the output current branch, i.e., one end of the described first resistor R1 connects the power supply
End, the other end of the first resistor R1 connect the emitter of the first PNP triode Q1, the first PNP triode Q1
Base stage connect the base stage of the second PNP triode Q2 and the collector of the second PNP triode Q2, the first PNP
The one end of the collector of triode Q1 as the output current branch, i.e., the collector connection of the described first PNP triode Q1
The output end IMPD；The other end of the one end of the second resistance R2 as the reference current branch, i.e., described second electricity
The one end for hindering R2 connects the power end, and the other end of the second resistance R2 connects the transmitting of the second PNP triode Q2
Pole, the one end of the collector of the second PNP triode Q2 as the reference current branch, i.e., described second PNP triode
The collector of Q2 connects the input terminal IPD.
Further, the thermistor RNTCIt is connected in the output current branch, and the thermistor RNTCIt is negative
The thermistor of temperature coefficient.In the present embodiment, the thermistor RNTCIt is connected on the power end and the first resistor
Between one end of R1, i.e., one end of the described first resistor R1 passes through the thermistor RNTCConnect the power end.Certainly, institute
State thermistor RNTCThe other end of the first resistor R1 and the emitter of the first PNP triode Q1 can also be connected on
Between, i.e., the other end of the described first resistor R1 passes through the thermistor RNTCConnect the transmitting of the first PNP triode Q1
Pole, as shown in Figure 2.
Temperature self-adaptation current source provided in this embodiment flows through the sample rate current I of the output current branchMPDWith stream
Cross the feedback current I of the reference current branchPDProportional variation, and have:
Under room temperature, the transmitting optical power of the optical assembly is arranged in certain certain value, institute by configuring the driving chip
It states optical assembly and detects transmitting optical power, and be converted to the feedback current IPD, the temperature self-adaptation that provides through this embodiment
Current source is to the feedback current IPDCarry out ratio variation obtains the sample rate current IMPD, and by the sample rate current IMPDIt mentions
The driving chip is supplied, the driving chip is according to the sample rate current IMPDSize confirms the practical hair of the optical assembly at this time
The size of optical power is penetrated, and then adjusts bias current and modulation electric current, realizes transmitting optical power dynamic stability.
Due to the thermistor RNTCIn negative temperature coefficient feature, as the temperature rises, the thermistor RNTC's
Resistance value reduces, then the sample rate current IMPDIncrease, feed back to the driving chip, the driving chip thinks described at this time
Optical assembly actual transmission optical power becomes larger, thus reduces bias current and modulation electric current, reduces the transmitting light of the optical assembly
Power, to reduce the temperature of entire optical module.On the contrary, with the reduction of temperature, the thermistor RNTCResistance value become
Greatly, then the sample rate current IMPDReduce, feeds back to the driving chip, the driving chip thinks the optical assembly at this time
Actual transmission optical power becomes smaller, thus increases bias current and modulation electric current, avoids laser diode work in threshold limit value
Point and can not open, be also prevented from driving chip work in the lower limit of bias current and modulation electric current output, improve entire light
The reliability of module work.
Embodiment 2
The present embodiment provides a kind of temperature self-adaptation current source, Fig. 3 is the circuit diagram of the temperature self-adaptation current source.With
The temperature self-adaptation current source that embodiment 1 provides is compared, and difference is: thermistor RPTCIt is connected on the reference current branch
In, and the thermistor RPTCFor the thermistor of positive temperature coefficient.
In the present embodiment, the thermistor RPTCBe connected on the power end and the second resistance R2 one end it
Between, i.e., one end of the described second resistance R2 passes through the thermistor RPTCConnect the power end.Certainly, the thermistor
RPTCIt can also be connected between the other end of the second resistance R2 and the emitter of the second PNP triode Q2, i.e., it is described
The other end of second resistance R2 passes through the thermistor RPTCThe emitter for connecting the second PNP triode Q2, such as Fig. 4 institute
Show.
Temperature self-adaptation current source provided in this embodiment flows through the sample rate current I of the output current branchMPDWith stream
Cross the feedback current I of the reference current branchPDProportional variation, and have:
Due to the thermistor RPTCIn ptc characteristics, as the temperature rises, the thermistor RPTC's
Resistance value increases, then the sample rate current IMPDIncrease, feed back to the driving chip, the driving chip thinks described at this time
Optical assembly actual transmission optical power becomes larger, thus reduces bias current and modulation electric current, reduces the transmitting light of the optical assembly
Power, to reduce the temperature of entire optical module.On the contrary, with the reduction of temperature, the thermistor RPTCResistance value subtract
It is small, then the sample rate current IMPDReduce, feeds back to the driving chip, the driving chip thinks the optical assembly at this time
Actual transmission optical power becomes smaller, thus increases bias current and modulation electric current, avoids laser diode work in threshold limit value
Point and can not open, be also prevented from driving chip work in the lower limit of bias current and modulation electric current output, improve entire light
The reliability of module work.
Embodiment 3
The present embodiment provides a kind of temperature self-adaptation current source, Fig. 5 is the circuit diagram of the temperature self-adaptation current source.With
The temperature self-adaptation current source that embodiment 1 provides is compared, and difference is: the power end ground connection, the output current branch packet
First resistor R1 and the first NPN triode Q1 are included, the reference current branch includes second resistance R2 and the second NPN triode
Q2。
Specifically, the other end of the one end of the first resistor R1 as the output current branch, i.e., described first electricity
The one end for hindering R1 connects the power end, and the other end of the first resistor R1 connects the transmitting of first NPN triode Q1
Pole, the base stage of first NPN triode Q1 connect the base stage and second NPN triode of the second NPN triode Q2
The collector of Q2, the one end of the collector of first NPN triode Q1 as the output current branch, i.e., described first
The collector of NPN triode Q1 connects the output end IMPD；One end of the second resistance R2 is as the reference current branch
The other end on road, i.e., one end of the described second resistance R2 connect the power end, and the other end of the second resistance R2 connects institute
State the emitter of the second NPN triode Q2, the collector of the second NPN triode Q2 as the reference current branch one
The collector at end, i.e., the described second NPN triode Q2 connects the input terminal IPD.
Further, the thermistor RNTCIt is connected in the output current branch, and the thermistor RNTCIt is negative
The thermistor of temperature coefficient.In the present embodiment, the thermistor RNTCIt is connected on the power end and the first resistor
Between one end of R1, i.e., one end of the described first resistor R1 passes through the thermistor RNTCConnect the power end.Certainly, institute
State thermistor RNTCThe other end of the first resistor R1 and the emitter of first NPN triode Q1 can also be connected on
Between, i.e., the other end of the described first resistor R1 passes through the thermistor RNTCConnect the transmitting of first NPN triode Q1
Pole, as shown in Figure 6.
The working principle of temperature self-adaptation current source provided in this embodiment can refer to the description of embodiment 1, herein no longer
It repeats.
Embodiment 4
The present embodiment provides a kind of temperature self-adaptation current source, Fig. 7 is the circuit diagram of the temperature self-adaptation current source.With
The temperature self-adaptation current source that embodiment 3 provides is compared, and difference is: thermistor RPTCIt is connected on the reference current branch
In, and the thermistor RPTCFor the thermistor of positive temperature coefficient.
In the present embodiment, the thermistor RPTCBe connected on the power end and the second resistance R2 one end it
Between, i.e., one end of the described second resistance R2 passes through the thermistor RPTCConnect the power end.Certainly, the thermistor
RPTCIt can also be connected between the other end of the second resistance R2 and the emitter of the second NPN triode Q2, i.e., it is described
The other end of second resistance R2 passes through the thermistor RPTCThe emitter for connecting the second NPN triode Q2, such as Fig. 8 institute
Show.
The working principle of temperature self-adaptation current source provided in this embodiment can refer to the description of embodiment 2, herein no longer
It repeats.
Embodiment 5
The present embodiment provides a kind of optical module, Fig. 9 is the electrical block diagram of the optical module.The optical module includes
Optical assembly, driving chip and temperature self-adaptation current source, wherein the temperature self-adaptation current source is embodiment 1 to implementation
The temperature self-adaptation current source of 4 any embodiment of example description.
Specifically, the optical assembly is used under the driving of bias current and modulation electric current generate transmitting light, and detects institute
Transmitting optical power size is stated, the feedback current I is exportedPD.The optical assembly can be bi-directional light component, include transmitting optical assembly
With reception optical assembly.Backlight diode in the transmitting optical assembly is used to monitor the transmitting optical power size of laser diode,
And transmitting optical power is converted into the feedback current IPD。
The temperature self-adaptation current source is for receiving the feedback current IMPD, and the feedback current is become in proportion
It changes, exports the sample rate current IMPD, i.e., the described temperature self-adaptation current source is by the input terminal IPD reception feedback current
IMPD, the sample rate current I is exported by the output end IMPDMPD。
The driving chip is for receiving the sample rate current IMPD, and according to the sample rate current IMPDSize exports institute
State bias current and the modulation electric current.The driving chip is for providing bias current and modulation electric current to drive the light group
Laser diode in part emits optical signal, according to the sample rate current IMPDConfirm the optical assembly actual transmission optical power
Size, and make a response.
It should be noted that optical module provided in this embodiment, the temperature self-adaptation current source can be independent electricity
Line structure also can integrate in the optical assembly, can also be integrated in the driving chip, the present embodiment does not limit this
It is fixed.
Above-described specific embodiment, to the purpose of this utility model, technical scheme and beneficial effects carried out into
One step is described in detail, it should be understood that being not used to limit the foregoing is merely specific embodiment of the present utility model
Determine the protection scope of the utility model, within the spirit and principle of the utility model, any modification for being made equally is replaced
It changes, improve, should be included within the scope of protection of this utility model.
Claims (10)
1. a kind of temperature self-adaptation current source, which is characterized in that including proportion current source, thermistor, power end, input terminal with
And output end；
The proportion current source includes reference current branch and output current branch, and the thermistor is connected on the benchmark electricity
In stream branch or it is connected in the output current branch；
One end of the reference current branch connects the input terminal and is suitable for receiving the feedback current from optical assembly, described defeated
One end of current branch connects the output end and is suitable for exporting sample rate current to the driving chip of the optical assembly out, described to adopt
Sample electric current and temperature are positively correlated, described in the other end of the reference current branch is connected with the other end of the output current branch
Power end.
2. temperature self-adaptation current source according to claim 1, which is characterized in that the power end is suitable for receiving power supply electricity
Pressure, the output current branch include first resistor and the first PNP triode, the reference current branch include second resistance with
Second PNP triode；
The other end of the one end of the first resistor as the output current branch, the other end of the first resistor connect institute
State the emitter of the first PNP triode, the base stage of first PNP triode connect second PNP triode base stage and
The collector of the collector of second PNP triode, first PNP triode exports the one of current branch as described
End；
The other end of the other end of the one end of the second resistance as the reference current branch, the second resistance connects institute
State the emitter of the second PNP triode, the one end of the collector of second PNP triode as the reference current branch.
3. temperature self-adaptation current source according to claim 2, which is characterized in that the thermistor is negative temperature coefficient
Thermistor and the thermistor be connected in the output current branch；The temperature system alternatively, the thermistor is positive
Several thermistors and the thermistor are connected in the reference current branch.
4. temperature self-adaptation current source according to claim 3, which is characterized in that the thermistor is negative temperature coefficient
Thermistor；
The thermistor is connected between the power end and one end of the first resistor or thermistor series connection
Between the other end of the first resistor and the emitter of first PNP triode.
5. temperature self-adaptation current source according to claim 3, which is characterized in that the thermistor is positive temperature coefficient
Thermistor；
The thermistor is connected between the power end and one end of the second resistance or thermistor series connection
Between the other end of the second resistance and the emitter of second PNP triode.
6. temperature self-adaptation current source according to claim 1, which is characterized in that the power end ground connection, the output
Current branch includes first resistor and the first NPN triode, and the reference current branch includes tri- pole of second resistance and the 2nd NPN
Pipe；
The other end of the one end of the first resistor as the output current branch, the other end of the first resistor connect institute
State the emitter of the first NPN triode, the base stage of first NPN triode connect second NPN triode base stage and
The collector of the collector of second NPN triode, first NPN triode exports the one of current branch as described
End；
The other end of the other end of the one end of the second resistance as the reference current branch, the second resistance connects institute
State the emitter of the second NPN triode, the one end of the collector of second NPN triode as the reference current branch.
7. temperature self-adaptation current source according to claim 6, which is characterized in that the thermistor is negative temperature coefficient
Thermistor and the thermistor be connected in the output current branch；The temperature system alternatively, the thermistor is positive
Several thermistors and the thermistor are connected in the reference current branch.
8. temperature self-adaptation current source according to claim 7, which is characterized in that the thermistor is negative temperature coefficient
Thermistor；
The thermistor is connected between the power end and one end of the first resistor or thermistor series connection
Between the other end of the first resistor and the emitter of first NPN triode.
9. temperature self-adaptation current source according to claim 7, which is characterized in that the thermistor is positive temperature coefficient
Thermistor；
The thermistor is connected between the power end and one end of the second resistance or thermistor series connection
Between the other end of the second resistance and the emitter of second NPN triode.
10. a kind of optical module, which is characterized in that described in any item including optical assembly, driving chip and claim 1 to 9
Temperature self-adaptation current source；
The optical assembly is used under the driving of bias current and modulation electric current generate transmitting light, and detects the transmitting optical power
Size exports the feedback current；
The temperature self-adaptation current source is exported for receiving the feedback current, and to the feedback current scaling transformation
The sample rate current；
The driving chip, according to the sample rate current size, exports the bias current for receiving the sample rate current
With the modulation electric current.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820876919.0U CN208224884U (en) | 2018-06-07 | 2018-06-07 | Temperature self-adaptation current source and optical module |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820876919.0U CN208224884U (en) | 2018-06-07 | 2018-06-07 | Temperature self-adaptation current source and optical module |
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| CN208224884U true CN208224884U (en) | 2018-12-11 |
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|---|---|---|---|
| CN201820876919.0U Withdrawn - After Issue CN208224884U (en) | 2018-06-07 | 2018-06-07 | Temperature self-adaptation current source and optical module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108469868A (en) * | 2018-06-07 | 2018-08-31 | 博为科技有限公司 | Temperature self-adaptation current source and optical module |
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2018
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108469868A (en) * | 2018-06-07 | 2018-08-31 | 博为科技有限公司 | Temperature self-adaptation current source and optical module |
| CN108469868B (en) * | 2018-06-07 | 2024-08-13 | 博为科技有限公司 | Temperature self-adaptive current source and optical module |
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Address after: 314400 Room 201, building 2, No. 306, Gushui Road, Haining Economic Development Zone, Haining City, Jiaxing City, Zhejiang Province Patentee after: BOWEI TECHNOLOGY Co.,Ltd. Address before: 307, room 2, building 522, 314006 Asia Pacific Road, Nanhu District, Zhejiang, Jiaxing Patentee before: BOWEI TECHNOLOGY Co.,Ltd. |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Temperature adaptive current source and optical module Effective date of registration: 20211011 Granted publication date: 20181211 Pledgee: Agricultural Bank of China Limited by Share Ltd. South Lake branch Pledgor: BOWEI TECHNOLOGY Co.,Ltd. Registration number: Y2021980010558 |
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Granted publication date: 20181211 Effective date of abandoning: 20240813 |
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